I was having the same problem. Lenovo Windows 7 Enterprise, Intel Core i5-2520M CPU @ 2.50 GHz, 4GB RAM, 32-Bit
Seems that the welcome screen is taking 4+ mins to load. (I used a stopwatch to time it.)
The easiest solution seems to be to check the box at the bottom that stops the welcome screen from showing every time the program is opened.